webView:authenticationChallenge:shouldAllowDeprecatedTLS: Usage

I did not see webView:authenticationChallenge:shouldAllowDeprecatedTLS: (WKNavigationDelegate) mentioned in the session. I have two questions about how to use this API:
  1. What versions of TLS does WebKit define as deprecated?

  2. If an app is compliant with App Transport Security, is this method even called?

Answered by Apple Designer in 615887022
TLS 1.0 and 1.1 are deprecated (as *all* browser engines agreed, actually)

It is still called even with ATS.
Accepted Answer
TLS 1.0 and 1.1 are deprecated (as *all* browser engines agreed, actually)

It is still called even with ATS.
webView:authenticationChallenge:shouldAllowDeprecatedTLS: Usage
 
 
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